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    vs.      
David A Williams is tied in the series against Naoaki Umesaki, 1-1.

event round table player one result player two
2009 World Championship5178Williams, David A (1752)Won 2-0Umesaki, Naoaki (1598)
2009 World Championship1371Williams, David A (1808)Lost 0-2Umesaki, Naoaki (1685)